l-item-left,\n  .carousel-item-prev.carousel-item-right {\n    z-index: 1;\n    opacity: 1;\n  }\n\n  .active.carousel-item-left,\n  .active.carousel-item-right {\n    z-index: 0;\n    opacity: 0;\n    @include transition(0s $carousel-transition-duration opacity);\n  }\n}\n\n\n//\n// Left/right controls for nav\n//\n\n.carousel-control-prev,\n.carousel-control-next {\n  position: absolute;\n  top: 0;\n  bottom: 0;\n  z-index: 1;\n  // Use flex for alignment (1-3)\n  display: flex; // 1. allow flex...